Invitrogen™ CD22 Polyclonal Antibody

Rabbit Polyclonal Antibody

Supplier:  Invitrogen™ PA596427

Catalog No. PIPA596427

Description

Immunogen sequence: LQRRWKRTQS QQGLQENSSG QSFFVRNKKV RRAPLSEGPH SLGCYNPMME DGISYTTLRF PEMNIPRTGD AESSEMQRPP PDCDDTVTYS ALHKRQVGDY ENVIPDFPED EGIHYSELIQ FGVGERPQAQ ENVDYVILKH; Positive Samples: Raji; Cellular Location: Cell membrane, Single-pass type I membrane protein.

CD22 (BL-CAM) is a type 1 integral membrane glycoprotein with molecular weight of 130 to 140 kDa. CD22 is expressed in both the cytoplasm and cell membrane of B-lymphocytes. CD22 antigen appears early in B-cell lymphocyte differentiation at approximately the same stage as the CD19 antigen. Unlike other B-cell markers, CD22 membrane expression is limited to the late differentiation stages comprised between mature B cells (CD22+) and plasma cells (CD22-), and may thus prove useful in phenotyping mature leukemias. CD22 is also strongly expressed in hairy cell leukemia. CD22 preferentially binds to alpha2,6-linked sialic acid. The sialic acid recognition site can be masked by cis interactions with sialic acids on the same cell surface. Upon ligand induced tyrosine phosphorylation in the immune response seems to be involved in regulation of B cell antigen receptor signaling. CD22 plays a role in positive regulation through interaction with Src family tyrosine kinases and may also act as an inhibitory receptor by recruiting cytoplasmic phosphatases via their SH2 domains that block signal transduction through dephosphorylation of signaling molecules. CD22 is also strongly expressed in hairy cell leukemia. CD22 is also positive in diffuse large B-cell lymphoma and nodular lymphocyte predominance Hodgkin's lymphoma, but negative in classical Hodgkin's lymphoma.

Specifications

• Antigen: CD22
• Classification: Polyclonal
• Conjugate: Unconjugated
• Gene: CD22
• Gene Alias: A530093D23; B-cell receptor CD22; BL-CAM; B-lymphocyte cell adhesion molecule; B-lymphocyte cell adhesion molecule (BL-CAM); Cd22; CD22 antigen; CD22 molecule; FLJ22814; Lectin 2; Leu-14; Lyb8; Lyb-8; MGC130020; sialic acid binding Ig-like lectin 2; sialic acid-binding Ig-like lectin 2; Sialic acid-binding Ig-like lectin 2 (Siglec-2); Siglec2; Siglec-2; T-cell surface antigen Leu-14
• Host Species: Rabbit
• Purification Method: Affinity chromatography
• Regulatory Status: RUO
• Gene ID (Entrez): 12483, 308501, 933
• Content And Storage: -20°C, Avoid Freeze/Thaw Cycles
• Form: Liquid

• Applications: ELISA, Western Blot, Immunocytochemistry
• Concentration: 1.58 mg/mL
• Formulation: PBS with 50% glycerol and 0.02% sodium azide; pH 7.3
• Gene Accession No.: P20273, P35329
• Gene Symbols: CD22
• Immunogen: Recombinant fusion protein containing a sequence corresponding to amino acids 708-847 of human CD22 (NP_0017622).
• Quantity: 100 μL
• Primary or Secondary: Primary
• Target Species: Human, Mouse, Rat
• Product Type: Antibody
• Isotype: IgG